Digital Controller for Isolated Power Supply with PMBus Interface
The ADP1050 is an advanced digital controller with a PMBus™ interface targeting high density, high efficiency dc-to-dc power conversion. This controller implements voltage mode control with high speed, input voltage feedforward operation for enhanced transient and noise performance. The ADP1050 has four programmable pulse-width modulation (PWM) outputs capable of controlling most high efficiency power supply topologies, with the added control of synchronous rectification (SR).
The ADP1050 implements several features to enable a robust system of parallel and redundant operation for customers who require high availability. The device provides synchronization, prebias startup, and conditional overvoltage techniques to identify and safely shut down an erroneous power supply in parallel operation mode.
The ADP1050 is based on flexible state machine architecture and is programmed using an intuitive graphical user interface (GUI). The easy to use GUI reduces design cycle time and results in a robust, hardware coded system loaded into the built-in EEPROM. The small size (4 mm × 4 mm) of the LFCSP package makes the ADP1050 ideal for ultracompact, isolated dc-to-dc power module or embedded power designs.
- High density, isolated dc-to-dc power supplies
Intermediate bus converters
High availability parallel power systems
- Server, storage, industrial, networking, and communications
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
The evaluation board allows the ADP1050 to be exercised without the need for external components. The board is set up to act as an isolated PSU, outputting a rated load of 12 V, 20 A from a 36 V dc to 75 V dc source.
Multiple test points allow easy access to all critical points/pins. Three LEDs give the user a direct visual indication of variations in the board status, such as the system input voltage, PGOOD output, and FLAGIN input.
Full performance details are provided in the ADP1050 data sheet, which should be consulted in conjunction with user guide.
Designing Digital Power Supplies With A State Machine
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